Automatic nonstop longitudinal and lateral multiple-operation tool



April 1940- E. GAIRING 2,195,645

AUTOMATIC NONSTOP LONGITUDINAL AND LATERAL MULTIPLE-OPERATION TOOL Filed May 18, 1938 4 Sheets-Sheet 1 Fig. I

6 NvENTOR z TORNEY E GA|R|NG 2,195,645 AUTOMATIC NONSTQP LONGITUDINAL AND LATERAL MULTIPLE-OPERATION TOOL Filed May 18. 1958 4 Sheets-Sheet 2 JNVENTOR fi/AWATTQRNEY E. GAIRING April 2, 1940.

AUTOMATIC NONSTQP LONGITUDINAL AND LATERAL MULTIPLEOPERATION TOOL Filed May 18, 1958 4 Sheets Sheet 3 6'' -g g I INVENTOR ATTORNEY E. GAIRING April 2, 1940.

AUTOMATIC NONSTOP LONGITUDINAL AND LATERAL MULTIPLE-OPERATION TOOL 4 Sheets-Shet 4 Filed May 18, 1938 6 5 9 Z INVENTOR.

ATTORNEY.

. Patented Apr. 2, 1940 sir-so stares AUTOMATIC NONSTOP LONGITUDINAL AND LATERAL MULTIPLE-OPERATION TOOL Emil Gairing, Detroit, Mich, assignor to The Gairing Tool Company, Detroit, Mich.,- a 'corporation of Michigan Application May 18, 1935, Serial No. 208,626

5 Claims.

My invention relates to cutting tools and one. of the objects of my invention is to provide an improved cutting tool by which longitudinal and lateral cutting may be done in one uninterrupted continuous operation.

5 I secure this object in the apparatus shown in the accompanying drawings in which:

Figure 1 is a view of a tool embodying my invention, and mainly in section through its axis, showing also in broken lines an outline of a gate valve to be finished by said tool.

Figure 2 is a cross-sectional view on line 2-2 Figure 1.

Figure 3 is a view of the tool, turned 90 about itsaxis and partly broken away, the parts being in a different relative position to Figure 1.

Figure 4 is a section taken on line 44 Figure 3.

Figure 5 is a detail sectional view, taken on or about line 5-5 of Figure 4 showing the chaser 20 and cooperating parts on an enlarged scale.

Figure 6 is a view looking from above as shown in Figure 3.

Figure 7 is a section taken in a plane through the axis of the tool, as shown in Figure 6. a

Figure 8 is a cross-sectional view on line 8-8 Figure 7.

Figure 9 is a cross-sectional view taken on line 9-9 Figure 7. a

Figure 10 is a detail view largely broken away showing the chaser and operating parts in released position.

,Referring to the accompanying drawings, 6 indicates an outer sleeve, having a coaxial bore 5b. Numeral 8a denotes a slot cut transversely through the walls of the sleeve 6, and axis thereof. Numeral Hi indicates a slot out transversely through the wall of said sleeve at right angles to the slot Ba, and in a plane at an angle to the axis of said sleeve and the plane of the slot 811.

Numeral 4 designates a pilot-bar fitting, adapted to slide in the bore of the sleeve 6, and having a spindle 4a, coaxial therewith, extending through an end of said sleeve. Numeral 3 denotes a. stop-nut adapted to be adjusted to different positions on the spindle 4a, and fixed in the position to which it is adjusted. Numeral I denotes a compression spring, bearing at one end against the end wall of the sleeve 6, and at the other end against the pilot bar 4, opposite the end from which the spindle 411 projects. Numeral 8 denotes a tool-block fitting and adapted to slide in the slot 8a, transversely of the sleeve 6. Numeral II indicates an angular slot through the sleeve 6, and Ha, a slot in the pilot bar 4, transversely of the block 8. Numeral 9 denotes adapted to slide longitudinally in a bore in the a pin passing through the slot Ila, and fixed in said block 8, by a set-screw 9b as shown in the drawings. The ends of the pin 9 engage in the slanting slot II, and said slot, where it passes through the pilot-bar 4, is elongated to permit the relative motion of thevpin 9. Numeral 8b denotes tool bits, in the end of the block 8. Numeral 6a, indicates cutting tools on the sleeve 6. Numeral indicates a ring surrounding the spindle 4a, and fixed in a ball bearing to provide a thrust bearing for the stop-nut 3.

' Numeral 2 denotes a chaser spaced fromthe cutters 6a. and engaging at its lower edge upon a bearing surface on the sleeve 6, inclined longitudinally outward towardthe rear.- Numeral i3 denotes a spring adapted to urge said chaser forward and 2b denotes a set-screw for limiting the rearward and outward movement of said chaser. Numeral 2| indicates'a rod, fitting and sleeve 6, parallel to the axis of said sleeve.

Numeral 2Ia, indicates an arm extending at right angles from the end of the rod 2|, to a position in front of the chaser 2, at which point it is pro! vided with a set-screw for adjusting its point of engagement with said chaser face.

Numeral I4 is a spring urging the rod 2| forward so as to permit the chaser 2, under the impulse of its spring l3, to move to its forward and inner position. Numeral 20 denotes a lever arm pivoted tothe rear end of the rod 2|, and

having a cam 20!; at its pivoted end. When the lever arm 20 is in the position shown in Figure 10, the spring I4 forces the rod 2| forward withdrawing its Iarm 2| a, from contact with the chaser 2. When said lever arm is turned to the position shown in Figure 3, the rod 2| is drawn rearward by the action'of the cam. 20a, and the chaser 2 is forced backward and outward.

The operation of the above described device is as follows:

The broken lines represent a gate valve and itis desired to finish and screw thread the circular surfaces A and 'B and to finish the surfaces C and D.

The tool is held without rotating in the turret machine and the work, in this case the gate valve, is rotated. The lever 20 is turned to the position shown in Figure 3, thus bringing the chaser 2 into place to cut the threads .in the surfaces A and B. The turret presses the tool forward and. the cutters 6a, first finish the surface A and pass beyond the same. The chaser 2 then en-. gages, and cuts the screw-threads in said surface, and as the tool is further advanced, these operations are repeated on the surface B. The stopnut 3, now engages the thrust bearing 5, and prevents the pilot-bar 4, from moving longitudinally any further. The sleeve 6, is however, forced along further so that the slanting sides of the slot ll act upon the pin 9, to force the tool-block 8, laterally of the tool, so that the cutters 8b, engage and finish the surfaces C'D. During the latter part of the forward motion of the sleeve 6, the spring I is further compressed, thereby securely holding the bar 4, and stop nut 3, against ball bearing 5, while tool bits 817, finish the surfaces D and C, and then retract. When this operation is accomplished the lever 20 is swung to the position shown in Figure 10, whereupon the chaser 2 returns to its forward and inward position. The sleeve 6 thereupon returns to its initial position (see Figure 1), and the pin 9 to its former location in the slot ll, causing block 8 to retract, whereupon the tension of the spring 1 is sufiiciently released to permit the bar 4, to return as a unit with the sleeve 6, to the position indicated in Figure 1.

What I claim is: a

1. In a cutting tool, the combination of a sleeve; a pilot-bar adapted to fit into said sleeve and slide longitudinally thereof; a spring interposed between the end of said pilot-bar and said sleeve acting to oppose relative longitudinal motion of said bar and sleeve; a tool-block adapted to lit and slide laterally in. a transverse slot in said pilot-bar, said sleeve being slotted, and said block extending through said slot, said slot in said sleeve being sufilcient to permit said block to move longitudinally of said sleeve; said sleeve having a cam surface thereon inclined to its direction of motion; a lug extending from said toolblock and engaging said cam surface; means for imparting a longitudinal motion to said sleeve; and a thrust bearing adapted to engage said pilotbar to stopits longitudinal motion.

2. A cutting tool having a surface inclined to its axis; a chaser fittingv and adapted to slide on said surface; an actuating rod adapted to slide in a bore longitudinal of said tool and having an arm extending laterally from said rod to engage said chaser; and a cam lever adapted to move said rod to actuate said chaser, and to fix said rod in its adjusted position.

3. A cutting tool comprising a pilot-bar and a sleeve adapted to move with reference to each other; a yielding means acting against said relative motion; cutters upon said tool; a tool-block carried by said tool and adapted to be actuated laterally of the same by stoppage of the pilot-bar and the relative motion between said bar and sleeve; said tool being adapted for relative rotation and longitudinal motion with respect to its work when driven by a source of power, which causes a relative movement between said bar and sleeve to actuate said tool-block and retract the cutters after said cutters have done their work.

4. A cutting tool comprising a pilot-bar and a sleeve adapted to move longitudinally with reference to each other; cutters upon said tool, atoolblock carried by said too-l and adapted to be ac- 5.- In a cutting tool, the combination of a pilotbar and a sleeve longitudinally movable relative to each other; a spring interposed between said bar andsleeve acting to resist said relative motion; a tool-block carried by the sleeve-and movable laterally of said tool; a cam on the pilotbar; a lug carried by said block and engaging said cam; said tool being adapted to be fed longitudinally; and means for interrupting themotion of the pilot-bar so that the further longitudinal motion shall cause a relative motion, of said parts and contract said spring.

EMIL GAIRING. 

